| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 07 Oct 2022 | 06 Oct 2022 | 000-15415 | |
| 4 | Open Document | Open Filing | 07 Apr 2022 | 30 Mar 2022 | 000-15415 | |
| 4 | Open Document | Open Filing | 13 Jan 2022 | 31 Dec 2021 | 000-15415 | |
| 4 | Open Document | Open Filing | 09 Sep 2021 | 20 Aug 2021 | 000-15415 | |
| SC 13D/A | Open Document | Open Filing | 09 Sep 2021 | |||
| 4 | Open Document | Open Filing | 07 Mar 2019 | 05 Mar 2019 | 000-15415 | |
| SC 13D/A | Open Document | Open Filing | 07 Mar 2019 | |||
| SC 13D/A | Open Document | Open Filing | 14 Sep 2018 | |||
| 4 | Open Document | Open Filing | 10 Sep 2018 | 06 Sep 2018 | 000-15415 | |
| 4 | Open Document | Open Filing | 28 Mar 2018 | 23 Jan 2018 | 000-15415 | |
| SC 13D/A | Open Document | Open Filing | 11 Sep 2017 | |||
| 4/A | Open Document | Open Filing | 11 Sep 2017 | 21 Jun 2017 | 000-15415 | |
| 4 | Open Document | Open Filing | 14 Aug 2017 | 07 Aug 2017 | 000-15415 | |
| 4 | Open Document | Open Filing | 21 Apr 2017 | 21 Apr 2017 | 000-15415 | |
| 4 | Open Document | Open Filing | 15 Mar 2017 | 15 Mar 2017 | 000-15415 | |
| 4 | Open Document | Open Filing | 14 Mar 2017 | 12 Jan 2017 | 000-15415 | |
| 4 | Open Document | Open Filing | 23 Dec 2016 | 25 Nov 2016 | 000-15415 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Aug 2016 | 05 Aug 2016 | 000-15415 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Jan 2016 | 14 Jan 2016 | 000-15415 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Jan 2016 | 05 Jan 2016 | 000-15415 |
| 4 | Open Document | Open Filing | FORM 4 FILING | 24 Dec 2015 | 17 Dec 2015 | 000-15415 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Sep 2015 | 23 Jul 2015 | 000-15415 |
| SC 13D | Open Document | Open Filing | 09 Jul 2015 | |||
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Jul 2015 | 01 Jul 2015 | 000-15415 |